Test Bank for Chemical Principles The Quest for Insight 27th Edition by Peter Atkins; Loretta Jones

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Chapter 02 - Atoms, Molecules, and Ions
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1. Accordingwtowthewlawwofwdefinitewproportions,
a. thewratiowofwthewmasseswofwthewelementswinwawcompoundwiswalwayswthewsame.
b. itwiswnotwpossiblewforwthewsamewtwowelementswtowformwmorewthanwonewcompound.
c. ifwthewsamewtwowelementswformwtwowdifferentwcompounds,wtheywdowsowinwthewsamewratio.
d. thewtotalwmasswafterwawchemicalwchangewiswthewsamewaswbeforewthewchange.
ANSWER: a
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.2
KEYWORDS: compoundw|wgeneralwchemistryw|wgeneralwconceptsw|wmatter

2. Whichwofwthewfollowingwpairswofwcompoundswcanwbewusedwtowillustratewthewlawwofwmultiplewproportions?
a. CaOwandwCaCl2
b. NOwandwNO2
c. H2SwandwHBr
d. SiH4w andwSiO2
e. NF3wandwNCl3
ANSWER: b
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.2
KEYWORDS: compoundw|wgeneralwchemistryw|wgeneralwconceptsw|wmatter

3. HowwmanywofwthewfollowingwdidwDaltonwnotwdiscusswinwhiswatomicwtheory?
I. isotopes
II. ions
III. protons
IV. neutrons
V. electrons
a.w 2
b.w5
c.w 4
d.w1
e.w 3
ANSWER: b
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.3
KEYWORDS: atomicwtheorywofwmatterw|wDalton'swatomicwtheoryw|wearlywatomicwtheoryw|wgeneralwchemistry

4. Whenw2.0wLwofwoxygenwgasw(O2)wreactswwithw1.0wLwofwnitrogenwgasw(N2),w2.0wLwofwgaseouswproductwiswformed.
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Chapter 02 - Atoms, Molecules, and Ions
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Allwvolumeswofwgaseswarewmeasuredwatwthewsamewtemperaturewandwpressure.wWhatwiswthewformulawofwthewproduct?
a. NO
b. NO4
c. N2O3
d. N2O
e. NO2
ANSWER: e
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.4
KEYWORDS:
chemicalwformulaw|wchemicalwsubstancew|wearlywatomicwtheoryw|wgeneralwchemistryw|wmolec
ularwsubstance

5. Whichwonewofwthewfollowingwstatementswaboutwatomicwstructurewiswfalse?
a. Almostwallwofwthewmasswofwthewatomwiswconcentratedwinwthewnucleus.
b. Thewprotonswandwneutronswinwthewnucleuswarewverywtightlywpacked.
c. Thewnumberwofwprotonswandwthewnumberwofwneutronswarewalwayswthewsamewinwthewneutralwatom.
d. Thewelectronswoccupywawverywlargewvolumewcomparedwtowthewnucleus.
ANSWER: c
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.4
2.5
KEYWORDS: atomicwtheorywofwmatterw|wearlywatomicwtheoryw|wgeneralwchemistryw|wnuclearwstructure

6. Whichwofwthewexperimentswlistedwbelowwdidwnotwprovidewthewinformationwstatedwaboutwthewnaturewofwthewatom?
a. ThewRutherfordwexperimentwprovedwthatwthewThomsonw"plumwpudding"wmodelwofwthewatomww
aswessentiallywcorrect.
b. ThewRutherfordwexperimentwdeterminedwthewchargewonwthewnucleus.
c. Thewcathode-raywtubewprovedwthatwelectronswhavewawnegativewcharge.
d. Millikan'swoil-
dropwexperimentwshowedwthatwthewchargewonwanywparticlewwaswawsimplewmultiplewofwthewchargewonwt
hewelectron.
ANSWER: a
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.5
KEYWORDS: atomicwtheorywofwmatterw|wearlywatomicwtheoryw|wgeneralwchemistryw|wstructurewofwthewatom

7. Whichwofwthewfollowingwatomicwsymbolswiswincorrect?

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Chapter 02 - Atoms, Molecules, and Ions
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a. 31
15P
b. 19
9F




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Chapter 02 - Atoms, Molecules, and Ions
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c. 34
17Cl
d. 39
19K
e. 15
8C

ANSWER: e
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.5
KEYWORDS: atomicwtheorywofwmatterw|wearlywatomicwtheoryw|wgeneralwchemistryw|wisotope

8. Thewelementwrheniumw(Re)wexistswaswtwowstablewisotopeswandw18wunstablewisotopes.wRhenium-
185whaswinwitswnucleus
a. 75wprotons,w110wneutrons.
b. 75wprotons,w75wneutrons.
c. 75wprotons,w130wneutrons.
d. 130wprotons,w75wneutrons.
e. notwenoughwinformationwiswgiven.
ANSWER: a
POINTS: 1
DIFFICULTY:w easy
TOPICS: 2.5
KEYWORDS: atomicwtheorywofwmatterw|wearlywatomicwtheoryw|wgeneralwchemistryw|wisotope

9. Whichwofwthewfollowingwstatementswis(are)wtrue?
I. OwandwFwhavewthewsamewnumberwofwneutrons.
CwandwNwarewisotopeswofweachwotherwbecausewtheirwmasswnumberswar
II. ewthewsame.
III. O2–w haswthewsamewnumberwofwelectronswaswNe.
a. Iwonly
b. IIwonly
c. IIIwonly
d. IwandwIIwonly
e. IwandwIIIwonly
ANSWER: c
POINTS: 1
DIFFICULTY:w moderate
TOPICS: 2.5
KEYWORDS: atomicwtheorywofwmatterw|wearlywatomicwtheoryw|wgeneralwchemistryw|wisotope

10. Whichwamongwthewfollowingwrepresentwawsetwofwisotopes?wAtomicwnucleiwcontaining
I. 20wprotonswandw20wneutrons.
II. 21wprotonswandw19wneutrons.

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